TM172 alarm detection

[otrotabi]

I maybe missing something very obvious here.

Although in comparison a lot more limited than TM172, TM171 has a built in mechanism which allows to detect if anything is wrong as long as any item in the Alarms menu is set to 1. If that is so, then I can tell if an alarm is active by doing: 

AlarmActive := SysLocalLeds[16] = 1;

The Alarms menu does exist in TM172 as well. Is there any similar built-in mechanism ? I would like to avoid having to write a huge "OR" to detect an alarm.

Moreover, besides eventually using the Alarms folder to logically organize alarms (though Booleans seem to be easier to handle alarm visibility in the HMI), what is the functionality of this folder in TM172 ? I have not been able to find what it is useful for.

[FedericoM · Accepted solution]

Hello,

TM172 hasn't built-in functionalities related to alarms.

The solution is the one you mentioned, an OR among all managed alarms.

Folder alarm is present on TM172 just for portability reason of M171O projects.

On TM172, I suggest to define a Status variable for each alarm and show them on a dedicated folder of Commissioning/Installer and using the SET feature of the local/remote Display.

[LeTomas]

Hi @otrotabi ,

If I am not wrong i have asked to the experts the use of the "Alarms" on the "Configuration Tab" in ESME HVAC because I was not able to see the point for the M172 to use it because it does not create any variable on the display to use as alarm. I believe the answer was that the "Alarms" it is only for the M171O.

Best regards,

Leandro

[otrotabi]

Thanks for your answer.

Yes, I do use Sets to display the alarms. I have discovered that visibility of the distinct alarms maybe  set upon each alarm status (that is why the need to be boolean to make things easier)

However once I acknowledge them, I need a "global" alarm variable (this AlarmActive variable) to be able to display the alarm page again. Having to set the OR is another step you need not to forget. 

I wished all the alarm system could be made a little easier to manage. 

[otrotabi]

Thanks. Yes, indeed it does not seem to be of any use.

Regards